<template>
    <div class="login_container">
        <div class="login_box">
            <!--头像区域-->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>

            <!--
                登录表单区域
                   ref="" 指定表单对象，类似于id属性，相当于返回DOM对象
            -->
            <el-form ref="loginFormRef"
                     label-width="0px"
                     :model="loginForm"
                     :rules="loginFormRules"
                     class="login_form">

                <!--用户名-->
                <el-form-item prop="username">
                    <el-input
                            v-model="loginForm.username"
                            placeholder="请输入账号"
                            prefix-icon="iconfont icon-user">

                    </el-input>
                </el-form-item>

                <!--密码-->
                <el-form-item prop="password">
                    <el-input
                            v-model="loginForm.password"
                            placeholder="请输入密码"
                            prefix-icon="iconfont icon-3702mima"
                            type="password">

                    </el-input>
                </el-form-item>

                <!--按钮区域-->
                <el-form-item class="btns">
                    <el-button type="primary" v-on:click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
    export default {
        name: "Login",
        data() {
            return {
                //这是登录表单的数据绑定对象
                loginForm: {
                    username: 'admin',
                    password: '123456'
                },
                //loginFormRules 这是表单的验证规则
                loginFormRules: {
                    //验证用户名是否合法
                    username: [
                        {required: true, message: '请输入登录名称', trigger: 'blur'},
                        {min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur'}
                    ],
                    //验证密码是否合法
                    password: [
                        {required: true, message: '请输入登录密码', trigger: 'blur'},
                        {min: 6, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur'}
                    ]
                }
            }
        },
        methods: {
            //点击重置按钮，重置登录表单
            resetLoginForm() {
                //this指向当前组件的实例对象Login.vue
                console.log(this);
                console.log(this.$refs.loginFormRef);
                this.$refs.loginFormRef.resetFields();

            },
            login() {
                /*  this.$refs.loginFormRef.validate(function (valid) {
                      console.log(valid);
                  });*/
                this.$refs.loginFormRef.validate(async (valid) => {
                    console.log(valid);
                    if (!valid) return;
                    //const result = await this.$http.post('login',this.loginForm);
                    //结构数据
                    const {data: res} = await this.$http.post('login', this.loginForm);
                    /*console.log(res);
                    //then同步
                    let resp = this.$http.post('login',this.loginForm).then(resp);
                    console.log((await resp).data)*/

                    //if (res.meta.status != 200) return console.log('登录失败');
                    if (res.meta.status != 200) return this.$message.error("登录失败！");
                    this.$message.success("登录成功！");
                    /*
                    * 1. 将登录成功之后的token，保存到客户端的sessionStorage中
                    *   1.1 项目中出了登录之外的其他API接口，必须在登录之后才能访问
                    *   1.2 token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
                    * 2. 通过编程式导航跳转到后台主页，路由地址是/home
                    *
                    */
                    console.log(res);
                    //1.2 token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
                    window.sessionStorage.setItem('token',res.data.token);
                    //通过编程式导航跳转到后台主页，路由地址是/home
                    this.$router.push('/home')
                });

            }

        },


    }
</script>

<style lang="less" scoped>
    .login_container {
        background-color: #2b4b6b;
        height: 100%;
    }

    .login_box {
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);

        .avatar_box {
            height: 130px;
            width: 130px;
            border: 1px solid #eee;
            border-radius: 50%;
            padding: 10px;
            box-shadow: 0 0 10px #ddd;
            position: absolute;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: #fff;

            img {
                width: 100%;
                height: 100%;
                border-radius: 50%;
                background-color: #eee;
            }
        }
    }

    .login_form {
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
    }

    .btns {
        display: flex;
        justify-content: flex-end;
    }
</style>
